package ProduceAndconsum;

/**
 * @projectName: JUC
 * @package: ProduceAndconsum
 * @className: A
 * @author: 冷环渊 doomwatcher
 * @description: TODO
 * @date: 2022/3/1 21:08
 * @version: 1.0
 */
public class A {
    public static void main(String[] args) {
        Data data = new Data();
        new Thread(() -> {
            for (int i = 0; i < 10; i++) {
                try {
                    data.increment();
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
            }
        }, "A").start();
        new Thread(() -> {
            for (int i = 0; i < 10; i++) {
                try {
                    data.decrement();
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
            }
        }, "B").start();
        new Thread(() -> {
            for (int i = 0; i < 10; i++) {
                try {
                    data.increment();
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
            }
        }, "C").start();
        new Thread(() -> {
            for (int i = 0; i < 10; i++) {
                try {
                    data.decrement();
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
            }
        }, "D").start();
    }
}

//数字 资源类
// 1、 判断等待，通知
class Data {
    private int number = 0;

    //    +1
    public synchronized void increment() throws InterruptedException {
        while (number != 0) {
            //    等待
            this.wait();
        }
        number++;
        System.out.println(Thread.currentThread().getName() + "=>" + number);
        //    通知其他线程 +1 完毕了
        this.notifyAll();
    }

    //    -1
    public synchronized void decrement() throws InterruptedException {
        while (number == 0) {
            //    等待
            this.wait();
        }
        number--;
        System.out.println(Thread.currentThread().getName() + "=>" + number);
        //    通知其他线程 -1 完毕了
        this.notifyAll();
    }
}